[MP3 ENCODER] more patch merging... mdct & fft

[Takehiro Tominaga]

Hi all!

11/3 is holiday in Japan, and I have plenty of time...

check this new patch containing new MDCT/subband filtering and FFT.
This patch can be applied to both of the original LAME 3.37beta(3.50stable)
and LAME3.37 with my yesterday Huffman coding patch.

On my architechture, the benchmark result is
 lame 3.37 (normal)     32.54
  + Humman patch        30.37
  + MDCT + FFT          27.90
---
Takehiro TOMINAGA // may the source be with you!

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